MAGNETIC-RESONANCE-IMAGING (MRI) ASSESSMENT OF VOCAL FOLD MEDIALIZATION SURGERY

Historically, clinicians have used subjective assessment and perceptua l judgments, supplemented with acoustic measures, aerodynamic studies, and videostroboscopy, to determine the effects of phonosurgery. When phonosurgical results are poor, magnetic resonance imaging (MRI) can b e useful in determining how the surgical modifications contributed to the anatomical and functional status of the vocal folds. The authors p resent examples of MRI following vocal fold medialization by injection , thyroplasty, and arytenoid adduction, Findings reveal that the super ior contrast resolution of MRI can precisely identify placement and pe rsistence of injected implants and is particularly helpful in showing effects of the size and shape of alloplastic prostheses on vocal fold displacement. Such information is useful in troubleshooting suboptimal results and in planning revision thyroplasty by defining modification in the design of prostheses and the placement of cartilaginous window s in medialization thyroplasty. MRI can also aid in confirming indicat ions for and limitations of certain procedures.